NTU Singapore Develops Tear-Driven AR-based Contact Lens

A team of researchers at NTU Singapore is exploring an innovative augmented reality (AR) technology, they are developing an AR contact lens that can display virtual information in the real world. What's unique about this research is that these high-tech AR contact lenses are powered by human tears.

According to an official release from the university, the research team has begun developing a flexible battery with a thickness similar to that of the human cornea. This ultra-thin battery can store power when exposed to a source of salt water, which is contained in human tears. The researchers say that this solution allows the battery to keep powering up to four hours for every 12-hour cycle. It can also be recharged by an external battery and smart contacts.

To enhance the user experience, this battery is made from biocompatible materials and no wires or hazardous substances were used in the production process. This product is expected to deliver a more comfortable wearing experience compared to some other smart contacts.

Dr. Yun Jeonghun, a researcher at NTUitive's Department of Electrical and Electronic Engineering, explains, "Conventional smart contact lenses are mostly charged using metal electrodes, which may have adverse effects if exposed to light. Another charging method is inductive charging, which requires power to be transmitted through a coil in the lens, like a wireless charging pad for smartphones. Our tear battery eliminates the potential problems with both methods, while also opening up the possibility of developing more advanced smart contact lens devices."

The university said they have applied for a patent for the technology and plan to commercialize it in the future.